The more film the Bills defensive players watched in the week leading up to Sunday’s 43-23 annihilation of the Jets at MetLife Stadium, the more they salivated. By the time the game started, they were itching with anticipation they were going to feast on Jets second-year quarterback Geno Smith.

And so they did.

The scouting report on Smith for two years has been he is a one-read quarterback and if the first read isn’t there, he is in trouble.

On Sunday, Smith was not even effective on his first reads, overthrowing wide-open receivers and, in the end, turning the ball over three times on interceptions in the first 10:20 of the game.

Smith (2-of-8 for 5 yards and a quarterback rating of 0.0) lasted four offensive possessions before being yanked in favor of veteran Michael Vick.

Smith was so bad the Bills were hoping the Jets would not bench him. One member of the Bills organization told The Post: “We were bummed out when they took Geno out,’’ because the pickings were becoming too easy.

“He was just eyeing down receivers,’’ said Bills linebacker Preston Brown, who got Smith’s second interception. “We saw it on film that he was just staring guys down. When we know if you do that we’re going to jump on guys’ routes, and we got some picks in the back-end with just reading his eyes.

“We had Geno rattled and we tried to stay after him.’’

Bills defensive tackle Corbin Bryant, who forced a fumble recovered by Buffalo, said Smith “from the first snap didn’t seem like he was in rhythm.

“When we see that, we’re going to be in a feeding frenzy, causing as many turnovers as we can … and we did that,’’ Bryant said.

“You could see from the very first snap [Smith] wasn’t connecting with any of his receivers and our DBs took advantage of that,’’ said Bills defensive tackle Stefan Charles, who recovered the fumble Bryant forced.

“Our main thing was to get our D-line in Geno’s face and get him rattled, make him have hot feet in the pocket so he can’t be comfortable back there,’’ said Bills linebacker Nigel Bradham, who had a forced fumble. “Fortunately, we came out hot and caused a bunch of turnovers. Vick came into the game and gave us some different looks and scrambled and we had to make some adjustments.

“When he got in there he was just running around … like the old Vick, almost.’’

The key word there was almost. After Smith threw his three interceptions, Vick also threw one and lost two fumbles.

“They came out right at the bat and got some turnovers,’’ Bills coach Doug Marrone said. “We were playing well. They made the switch at quarterback and I thought we had them at times.’’

File that as the understatement of the day. The Bills had the Jets before they left Buffalo, when they were watching tape of Smith.